JPH0471559B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an automatic sewing device, in particular, for attaching a belt-shaped bag-shaped sewn product fabric such as a skirt belt to the upper edge of a cylindrical sewn product fabric such as a skirt. The present invention relates to a gripping device for the above-mentioned double-sewn product fabric when assembled and sewn by a sewing machine.

[Prior Art] Conventionally, when assembling and sewing a band-shaped waist belt to the upper edge of the body of a cylindrical sewn product such as a skirt, the belt fabric is flexible and has an irregular shape. Therefore, mechanical handling was difficult.

Conventionally, this type of assembly suture has relied solely on the manual labor of skilled workers with dexterous hands, but in order to improve productivity, the inventors of the present application have developed
A novel "sewn product parts support structure" and "automatic assembly sewing control device" were invented, and each received a patent application.
The patent application has been filed under Japanese Patent Publication No. 60-179488 (Japanese Patent Publication No. 1-30515) and Japanese Patent Application No. 179489/1989 (Japanese Patent Publication No. 36795/1989).

A detailed explanation will be omitted to avoid duplication with the above-mentioned document, but as shown in FIG. 6, which is an explanatory view of the mechanism of the main part of the body support, there is a central shaft body 26 and a plurality of radii arranged radially around the circumference. A skirt body etc. is supported in a cylindrical shape on a body support body 1 consisting of a support piece that can be expanded/reduced in the direction and a guide rod 38 provided on the support piece so as to be movable up and down, and the circumferential tangent of the upper end of the cylinder is The tip of the waist belt of the belt-shaped bag body is hooked on the leading guide rod 38 from the direction, and the assembly is sewn by a stationary sewing machine while guiding it around the upper edge of the skirt body rotating together with the support body. .

[Problems to be Solved by the Invention] However, in the conventional configuration as described above, the guide rod 38 enters the leading end of the belt and is engaged with the leading end of the belt.

Then, as the skirt body rotates due to the rotation of the body support 1, the other guide rods 38 also rotate while ascending in sequence, whereby the belt is attached to the upper edge of the skirt body (the upper edge of the body support 1). ) is pulled out in a circumferential manner.

However, since the belt is only latched to a plurality of guide rods 38 and there is nothing else to hold it down, it is not placed accurately along the upper edge of each radially curved guide rod, and the belt is not guided. During the process, the belt tends to escape upward and come off the upper edge of the guide rod, making it impossible to sew the belt and the skirt body in an accurate position.

Furthermore, since the belt is guided in a curved manner along the upper edge of the radially curved guide rod, "wrinkles" occur on the inner surface of the belt due to the belt's curvature, resulting in poor sewing quality. There were flaws.

The present invention has been made in view of the above-mentioned drawbacks, and it enables the belt to be placed in an accurate position without coming off the guide rod, and also eliminates the "wrinkles" that occur on the cloth surface inside the belt. It is an object of the present invention to provide a gripping device for sewing fabric that can eliminate the problem.

[Means for Solving the Problems] Therefore, in the present invention, the inside of the belt-shaped bag sewn product fabric as a belt guided to the upper edge of the body support is sequentially pressed in accordance with the rotation of the body support. A plurality of clamps are provided to prevent the belt from coming off the guide rod, and also to prevent wrinkles from forming on the inside cloth surface of the belt.

[Example] The present invention will be explained below based on examples.

FIG. 4 is a broken vertical sectional view of the main part of the embodiment of the body support according to the present invention, FIG. 5 is a perspective view of the entire sewing device, and FIGS. FIG. 3 shows a developed view in the direction of arrow X in FIG. 2.

[Configuration] First, in FIG. 5, which is an overall diagram of this sewing device, M
is a lockstitch sewing machine in which the needle is mounted on a support stand so that it can move horizontally, and although the support stand can move up and down/back and forth, it remains stationary at a predetermined position during sewing.

S is a radial body support that can be expanded/contracted and rotates around a vertical axis, and a cylindrical sewing fabric (in this example, a skirt body) 2 is set on the body support. Rotates with S.

1 is a sewn product fabric 1 that is a belt-shaped bag (in this example, it is a skirt waist belt)
Then, the guide stand device G moves the needle drop section 1 of the sewing machine M along the upper edge of the rotating skirt body 2.
3 (Figure 3).

Further, C is a control panel of this device, and V is a vacuum pressure source for supplying vacuum to each support piece 3 (Figs. 1 to 4) of the body support S through the manifold 16 (Fig. 4). It is.

FIG. 4 shows the main part of the body support S which is basically the same as that of the prior art example shown in FIG. 6.

In this configuration, as the pair of comb rings 21 slide up and down on the support shaft 20,
A plurality of support pieces 3 arranged radially in an umbrella shape
can be enlarged/reduced as shown by the two-dot chain line.

As shown in FIGS. 1 to 4, an air cylinder 4 (large cylinder) serving as a vertical drive means 4 is fixed on each support piece 3, and the tip of the piston rod moves vertically within the waist belt 1. A guide rod 6 is formed at the tip thereof to be held, a joint 5 is fixedly provided at the lower part of the guide rod 6, and a clamp 8 is rotatably attached around a rotating shaft 9.

This clamp 8 has a bracket 5 attached to each joint 5.
It is configured to be operated by an air cylinder 7 (referred to as a small cylinder 7) as a clamp driving means 7 which is attached via a cylinder a (FIGS. 1 and 2).

The pair of large and small cylinders 4 and 7 provided on each support piece 3 are operated by sequentially opening and closing a plurality of micro-switches 25 corresponding to each support piece 3 using a cylinder switch cam 22 (FIG. 4). This is done by controlling the solenoid valve 23.

The cylinder switch cam 22 and the micro switch 25 control the guide rod 6 and the clamp 8.
It constitutes an actuating means for sequentially driving the guide rod and clamp at a predetermined position, for example, when the guide rod and the clamp are located outside the sewing machine suturing site.

For example, the cylinder switch cam 22 has a ring-shaped planar shape with a notch in a part, and the micro switch 25 corresponding to the notch is
OFF, and other micro switches 25
may be configured so that it is turned on when pressed by the cam part.

Of course, since the relationship between the cylinder switch cam 22 and the micro switch 25 is relative, the cylinder switch cam 22 is
The same thing can be done even if the support piece 3 is made to rotate together with the support piece 3.

Further, 29 is a pusher cam which will be described later.

Next, the operation in the above configuration will be explained. In Figures 1 to 5, body part 2 of the skirt
is supported from inside by a plurality of radially arranged support pieces 3 of the support S, and the vacuum suction cup 2
7, it is set in the correct position.

On the other hand, the waist belt 1 is waiting in the correct positional relationship on the guide stand device C (Fig. 5). The sides are open.

Further, as shown in FIG. 3, the leading guide rod 11 is waiting at a predetermined position, and when it reaches the lower end of the waist belt 1, the solenoid valve 23 is activated.
The piston rod of the air cylinder 11a (Fig. 3) is extended, and a leading guide rod 1 is formed at the tip of the piston rod.
1 is inserted into the bag at the end of the belt.

Subsequently, when the support body S rotates and is sent in the fabric traveling direction (arrow Y), the waist belt 1 is pulled by the leading guide rod 11 and the upper edge of the skirt body 2 is pulled between the two folds of the belt 1. is interposed and progresses.

When the vehicle travels further a predetermined distance, the cylinder switch cam 22 turns on the micro switches 25 one after another.
Therefore, air is supplied to the predetermined large cylinder 4 and small cylinder 7 via the solenoid valve 23.

As a result, each guide rod 6 sequentially pops out and holds the inner top of the belt, and each clamp 8 sequentially rotates from the open state shown in FIG. 1 to the closed state shown in FIG. 2, and the belt 1 The inner surface of is held between the guide rod 6 and the clamp 8.

Therefore, even if the belt 1 is guided in a curved manner along the guide bar, the belt is held down by the clamp, so that the belt will not shift upward or come off the guide bar.

Furthermore, since the clamps sequentially press down on the inner surface of the belt, the "wrinkles" that occur on the inner side of the belt due to the belt being guided in a curved manner are successively suppressed and act to eliminate the "wrinkles".

As the feed due to the rotation of the support body S further progresses, the same operation continues one after another, and when the needle drop point 13 (FIG. 3) of the sewing machine M is reached, the micro switch 25 is sequentially activated to open the notch of the cam 22. By switching the solenoid valve corresponding to each micro switch 25, air is removed from the corresponding large and small cylinders 4 and 7, and the guide rod 6 is turned off.
and the clamp 8 returns to the state shown in FIG.

This avoids interference between the sewing machine needle, guide rod 6, and clamp 8.

When the sewing machine passes through the needle drop section 13, each cylinder is supplied with air and is brought into the state shown in Figure 2 again to grip the sewn waist belt 1 (ST in Figure 3 shows the stitches). Return to the state shown in Figure 2 and continue the process.

Note that when the guide rod 6 rises again at this time, the pusher cam 2 is installed so that the tip of the guide rod 6 does not interfere with the edge of the tightened belt 1 and push up.
9 (FIG. 4) temporarily pushes up the support piece through the cam follower roller 24a, thereby allowing the tip of the guide rod 6 to escape slightly inward.

In addition, in this embodiment, the case where the sewn product is a waist band sewn to the skirt body was explained, but it is not limited to this, and it can be made of cylindrical fabric and band-shaped fabric, such as pants and belts, or
Of course, it can also be applied to similar sewn products such as sleeves and cuffs.

[Effects of the Invention] According to the present invention, when sewing the fabric for a sewn belt-like bag such as a belt to the fabric for a cylindrical sewn product such as the body of a skirt, the fabric for the sewn bag-like bag is sequentially held down by a clamp. Since the material can be fed while moving, it is possible to prevent the possibility that the material for sewing a belt-shaped bag comes off from the support body and the guide rod, and it is possible to sew the material for sewing a belt-like bag at an accurate position on the material for a cylindrical sewing product. It has the effect of being able to

Furthermore, since the clamps sequentially press and guide the fabric for sewing the belt-shaped bag in a curved manner, wrinkles can be prevented and the quality of the sewing product can be improved.

[Brief explanation of the drawing]

FIGS. 1 and 2 are two operating state diagrams of main parts of an embodiment of the body support according to the present invention, and FIG.
The figure is a developed view in the X direction of Fig. 2, Fig. 4 is a vertical cross-sectional view of main parts of the body support, Fig. 5 is a perspective view of the entire sewing device, and Fig. 6 is a proposal of a conventional body support. It is an explanatory diagram of an example mechanism. 1...Waist belt (fabric for sewn belt-shaped bag),
2...Skirt body (tubular sewn product fabric), 3...
Support piece, 4...Large cylinder as vertical drive means, 6...Guide rod, 7...Small cylinder as clamp drive means, 8...Clamp, 22...Cylinder switch cam (operating means), 25... ...Micro switch (actuation means).

Claims (1)

[Scope of Claims] 1. A cylindrical upper edge of the cylindrical sewn product fabric attached to the outer periphery of a plurality of radially arranged support pieces 3 while rotating together with each support piece 3. In an automatic sewing device that feeds the fabric for sewing a belt-shaped bag over the front and back of the section to the sewing machine sewing section and stitches both fabrics together using the sewing machine, a guide rod is provided on each of the support pieces 3 so as to be movable up and down. 6, a vertical drive means 4 for vertically moving the guide rod, and a cylindrical sewing product fabric 1 rotatably supported on the guide rod.
a clamp 8 for gripping and releasing the inner surface of the clamp, and a clamp driving means 7 for rotating the clamp.
and an actuating means for controlling both drive means according to the rotational position of the support piece, which guides when the support piece is rotated from a position below the cylindrical sewn product material to a position in front of the sewing machine seam part. The two driving means are sequentially controlled to raise and clamp the rod and the clamp, and while the support piece is passing through the sewing machine stitching part, the two driving means are sequentially controlled so that the guide rod is lowered and the clamp is released from the clamp. The guide rod sequentially supports the belt-like bag-sewn product material fed sequentially to the upper edge of the cylindrical sewn product material supported on the support piece, and the inside of the belt-like bag-sewn product material. A fabric gripping device for a sewing machine, characterized in that the sides are sequentially pressed by clamps.